mxu 300 r Manuale-dofficina : Pagina 137

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Pagina 135

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Pagina 136

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Pagina 138

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Pagina 139

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          8. CYLINDER/PISTON                                                         MXU 250R/300R

                                                                            Intake Side Guide
 Inspect the exhaust side and intake side
 chain guides.
 Wear/Damage  Replace.




                                                 Exhaust Side Guide



 PISTON INSTALLATION                                                   "IN" Mark
 Remove any gasket material from the
 crankcase surface.
 Be careful not to drop foreign matters
   into the crankcase.
                                                                      IN
 Install the piston, piston pin and a new
 piston pin clip.
 · Position the piston "IN" mark on the
      intake valve side.
    · Place a clean shop towel in the
      crankcase to keep the piston pin clip
      from falling into the crankcase.



 CYLINDER INSTALLATION
 Install the dowel pins and a new cylinder
 gasket on the crankcase.
 Coat the cylinder bore, piston and piston
 rings with clean engine oil.
 Carefully lower the cylinder over the piston
 by compressing the piston rings.

 · Apply proper clean engine oil around
      cylinder wall.
    · Be careful not to damage or break the
      piston rings.
    · Stagger the ring end gaps at 120° to the
      piston pin.




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